空心轴过盈配合的微动接触分析  

Analyzing fretting contact of hollow shafts with interference fi t

作　　者：韩传军[1] 张杰[1] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500

出　　处：《华中科技大学学报（自然科学版）》2013年第5期23-27,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51004083)

摘　　要：以承受旋转弯曲载荷下的空心轴和轴套过盈装配体为研究对象,应用有限元法建立了接触模型,分别计算了不同过盈量、不同载荷、不同空心度和不同摩擦系数下,接触面上某一接触线的接触状态(黏着区、滑移区、张开区)和应力分布情况.引入修正系数对接触状态的判定公式进行了修正,并研究了各参数对修正系数的影响.结果发现:黏/滑交界点和滑/开交界点附近易产生微动裂纹;随着弯曲载荷的增大,接触面上的滑移区间大小不变,但其分布位置逐渐向接触中心移动;过盈量越大,接触面间发生磨损区间越小;轴的空心度不影响黏着区的大小,但控制着滑/开交界点位置;摩擦系数对法向接触应力值的影响较小,但切向应力值却随其增大而增大.The assembly body consisting of a hollow shaft and a sh aft sleeve under whirling bending load was assessed.The contact model was creat ed in ADINA,the contact status（sticking,sliding,and opening） and the distrib ution of stress on one contact line were computed based on different loads,inte rference values,hollowness,and friction coefficients.Judgment formula of cont act state was fixed by introducing the corrected coefficient.The results show t hat the initiation fretting cracks appear near the junction of stick-slip and s lip-open.The size of sliding is unchanged along with the increase of bending l oad.The greater the interference value is,the smaller wear range becomes.The h ollowness does not influence the size of sticking,but it controls the position of slip-open junction.The friction coefficient influences the normal stress a little,but tangential contact stress increases with the increase of the frictio n coefficient.

关 键 词：空心轴 过盈配合 有限元法 接触应力 微动 接触状态 

分 类 号：TH131.7[机械工程—机械制造及自动化]